Method and device for eliminating charging interference of compass, storage medium and terminal

Abstract

The invention discloses a method and device for eliminating charging interference of a compass, a storage medium and a terminal. The method comprises the following steps: acquiring an actual chargingcurrent value of the terminal when the terminal is detected to be in a charging state; changing the level state of a corresponding GPIO interface according to the actual charging current value; when acompass module of the terminal is called, querying the level states of all the GPIO interfaces, and acquiring a corresponding actual charging current value; and calibrating the indication direction of the compass module according to the actual charging current value. According to the invention, binary codes corresponding to actual charging current values are stored in a GPIO bridging mode in a CPU, and a software algorithm is adopted for correction of the data of a geomagnetic sensor, so interference of charging current on the electronic compass is overcome, the geomagnetic sensor can be placed on a PCB more flexibly, a hardware structure does not need to be changed, and research and development cost and the time cost are reduced.

Description

【Technical field】 [0001] The invention relates to the field of electronic compasses, in particular to a method, device, storage medium and terminal for eliminating compass charging interference. 【Background technique】 [0002] With the rapid development of smart terminals, most smart terminals are equipped with the function of electronic compass. The geomagnetic sensor can realize applications such as electronic compass and auxiliary navigation. Its core component is an anisotropic magnetoresistor. The resistance of the resistor changes according to the magnetic field of its environment. Changes can reflect the magnetic field characteristics of the location. At the same time, as smart terminals have higher and higher requirements for charging and battery life, the charging power has also increased repeatedly. During the charging process, the magnetic field generated on the current path has an inevitable influence on the direction of the compass, and the greater the current...

AI Technical Summary

Problems solved by technology

During the charging process, the magnetic field generated on the current path has an unavoidable influence on the direction of the compass, and the greater the current, the greater the interference, and the worse the accuracy of the compass

Although attention was paid to the layout of the geomagnetic field during the initial design stage of the smart terminal to keep the geomagnetic sensor away from various interferences, especially away from the charging (high current) path, but the charging current has increased to a certain level, and there is no safe enough place on the main board of the smart terminal. It is used to place the geomagnetic sensor. At this time, the current can only be reduced to reduce the impact

Images